1091428187732 has 24 divisors (see below), whose sum is σ = 2013167667840. Its totient is φ = 516312912960.

The previous prime is 1091428187701. The next prime is 1091428187749. The reversal of 1091428187732 is 2377818241901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9377708 + ... + 9493379.

It is an arithmetic number, because the mean of its divisors is an integer number (83881986160).

Almost surely, 2^{1091428187732} is an apocalyptic number.

It is an amenable number.

1091428187732 is a deficient number, since it is larger than the sum of its proper divisors (921739480108).

1091428187732 is a wasteful number, since it uses less digits than its factorization.

1091428187732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18871871 (or 18871869 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 1091428187732 in words is "one trillion, ninety-one billion, four hundred twenty-eight million, one hundred eighty-seven thousand, seven hundred thirty-two".